charge_price1: Number of kinah/AP needed to recharge one conditioning/augmentation point, when item is currently at level 1 charge level.

charge_price2: Number of kinah/AP needed to recharge one conditioning/augmentation point, when item is currently at level 2 charge level.

burn_on_attack: Number of actual conditioning/augmentation points deducted from this item, each time you make an auto attack. If this field is blank, there is no deduction when auto attacking. (Charge depletion still occurs when using a skill that cause charge depletion)

burn_on_defend: Number of actual conditioning/augmentation points deducted from this item, each time you take damage. If this field is blank, there is no deduction when you take damage.

Skills Table

cost_charge_weapon: Number of actual conditioning/augmentation points deducted from your weapon when you use this skill. Multiply this value by your item's charge_price1 or charge_price2 to determine actual kinah/AP cost per skill use.

cost_charge_armor: Number of actual conditioning/augmentation points deducted from your armor when you use this skill. Multiply this value by your item's charge_price1 or charge_price2 to determine actual kinah/AP cost per skill use.

polish_charge_weapon: I think this one deals with Idian charge depletion.